Observation Hive recommendations?

I'm thinking of getting some kind of portable Observation Hive that I could take to markets, talks, etc. next season. I was looking at the Ulster OB hive at Brushy Mt., and was wondering if anyone here had any experience with them (the Ulster hive, not Brushy Mt.). It looks like a nifty little OB hive, and another clever way to utilize a nuc, that can still be used for any other purpose you like.